Output power variation of an ambient radio frequency energy harvester due to its mobility taking path loss, multipath fading,shadowing and Doppler's effect into account | |
| Author | Hettiarachchi, Nuwan Dananjaya Joseph |
| Call Number | AIT RSPR no.TC-16-04 |
| Subject(s) | Radio frequency allocation Mobile communication systems Radio waves |
| Note | A research submitted in partial fulfillment of the requirements for the d egree of Master of engineering in Telecommunications |
| Publisher | Asian Institute of Technology |
| Abstract | The aim of this research is to capture free energy that is being generated from 3G or GSM Base stations and converting them to usable DC Power in order to power up low power devices. In this research, mainly the variation of usable DC output power with that of the RF energy captur ing device in motion is studied while considering losses such as Multi path fading, path loss, shadowing and Doppler's effect. The RF energy in Thailand is transmitted at 3G and GSM frequencies at the ambient environment as listed below are taken into acco unt for RF Energy harvesting. 850 MHz and 1800 MHz by 3G 900 MHz and 2100 MHz by GSM In the design of the RF Energy Harvester, initial stage is having four sub systems to capture RF Energy within the frequency bands given above for obtaining an effective DC output voltage. The receiving antenna captures these frequencies first and send it through a matching circuit to match both frequency and impedance, then converting the radio frequency into usable DC power through the use of a DC rectifier circuit and f inally increasing the DC output by a voltage doubler to a value through which any low voltage consuming device/s could be operated. Finally considering one base station (3G/ and a mobile RF energy harvester a relationship between the distance and the power at the output of the RF energy harvester is modeled all 4 above mentioned frequency bands taking path loss, multipath fading, shadowing and Doppler’s effect into account. |
| Year | 2016 |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Teerapat Sanguankotchakorn; |
| Examination Committee(s) | Attaphongse Taparugssanagorn;Shinichi Nakamura; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship |
| Degree | Research Studies Project Report (M.Eng.) - Asian Institute of Technology, 2016 |